4. describe the elements of the visual environment and how they affect health.

The elements of the visual environment and their affect on the health are:

Uses of the heavy metals in the environment are released into the soils from the landfills which contain the household waste and the industrial waste in the nature and it the by product of the mining ores.

Quality food production and the security of the food contain many components like production of the sufficient amount of the food and the contents in the food products.

they use tree rings to figure out weather patters.